Page 68 - 《摩擦学学报》2021年第5期

第 41 卷 第 5 期 摩 擦 学 学 报 Vol 41 No 5
2021 年 9 月 Tribology Sept, 2021

DOI: 10.16078/j.tribology.2020175

表面微织构对WC-8Co在往复摩擦磨损中

粘结-扩散磨损特性的影响

林国志, 梁 良 *
(华南理工大学 机械与汽车工程学院, 广东 广州 510640)

摘 要: 采用激光表面纹理化在WC-8Co上制备了微沟槽织构，通过往复式摩擦磨损试验对其与Ti6Al4V接触的耐
磨性进行分析，并以无表面微沟槽织构的WC-8Co为对比样品，研究了表面微织构对WC-8Co粘结-扩散磨损特性的
影响，揭示了摩擦过程中表面微织构的磨损机理. 结果表明：WC-8Co上的微沟槽对摩擦接触面具有抗粘结作用，在
高接触载荷下，这种效应更为明显. 织构表面的抗粘结机制是由微沟槽包裹的碎屑产生的. 此外，与无表面微织构的WC-8Co
不同，表面织构化的WC-8Co的磨损最初来源于微沟槽边缘的断裂，随后扩展到摩擦表面. 这种磨损特性归因于微
沟槽边缘的高热载荷和机械应力集中，以及激光加工过程中WC晶粒长大与摩擦过程中粘结剂Co扩散的协同效应.
关键词: 激光表面微织构; 粘结-扩散磨损; 微沟槽; WC-8Co; 往复式摩擦磨损试验
中图分类号: TH117 文献标志码: A 文章编号: 1004-0595(2021)05–0657–12

Effect of Surface Micro-Texturing on Adhesion-Diffusion Wear

Behavior of WC-8Co in Reciprocating Sliding

LIN Guozhi, LIANG Liang *

(School of Mechanical and Automotive Engineering, South China University of Technology,
Guangdong Guangzhou 510640, China)
Abstract: This study investigated the influence of surface micro-texturing on adhesion-diffusion wear behavior of the
WC-8Co and revealed the wear mechanism of surface micro-texturing. The micro-grooved texture was prepared on WC-
8Co by laser surface micro-texturing, and its wear resistance in contact with Ti6Al4V was evaluated through the
reciprocating friction and wear test. The untextured WC-8Co was utilized as a control sample. The test results illustrated
that the micro-groove on the WC-8Co was capable of anti-adhesion on the contact face, especially under high contact
load. The anti-adhesion mechanism of the textured surface was resulted from the entrapment of debris by the micro-
groove. Moreover, unlike the untextured WC-8Co, the wear of the textured WC-8Co initially derived from the breakage
of the micro-groove edge, and subsequently propagated to the friction surface. This wear behavior was attributed to the
high thermal load and mechanical stress concentration on the micro-groove edge, as well as the synergistic effects of
WC grain growth during laser machining and element diffusion in the sliding friction process.
Key words: laser surface micro-texturing; adhesion-diffusion wear; micro-grooves; WC-8co; reciprocating friction and wear test.

Received 14 August 2020, revised 7 November 2020, accepted 10 November 2020, available online 28 September 2021.
*Corresponding author. E-mail: melliang@scut.edu.cn, Tel: +86-20-87110032.
The project was supported by the Guangzhou Science and Technology Project (201904010239), Fundamental Research Funds for the
Central University (2020ZYGXZR084), Natural Science Foundation of Guangdong Province for Basic and Applied Basic Research
(2021A1515010879), the National Natural Science Foundation of China (51575193) and Key Projects of Guangdong Natural
Science Foundation (2018B030311051).
广州市科技计划项目(201904010239), 中央高校基本科研业务费专项资金重点项目(2020ZYGXZR084), 广东省基础与应用基
础研究基金自然科学基金面上项目(2021A1515010879), 国家自然科学基金(51575193)和广东省自然科学基金重点项目
(2018B030311051)资助.